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221351-33-3

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221351-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221351-33-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,5 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221351-33:
(8*2)+(7*2)+(6*1)+(5*3)+(4*5)+(3*1)+(2*3)+(1*3)=83
83 % 10 = 3
So 221351-33-3 is a valid CAS Registry Number.

221351-33-3Relevant articles and documents

Fluorination-triggered tandem cyclization of styrene-type carboxylic acids to access 3-aryl isocoumarin derivatives under microwave irradiation

Yuan, Jinwei,Zeng, Fanlin,Mai, Wenpeng,Yang, Liangru,Xiao, Yongmei,Mao, Pu,Wei, Donghui

, p. 5038 - 5046 (2019/06/03)

A practical and straightforward synthetic route through a fluorination-triggered tandem cyclization of styrene-type carboxylic acids was developed to construct a variety of 4-fluoro-3-aryl-3,4-dihydroisocoumarins and 3-arylisocoumarins under microwave irr

Super acid catalysed sequential hydrolysis/cycloisomerization of o-(acetylenic)benzamides under microwave condition: Synthesis, antinociceptive and antiinflammatory activity of substituted isocoumarins

Praveen, Chandrasekaran,Dheenkumar,Perumal

, p. 71 - 83 (2013/05/09)

Synthesis of isocoumarins and related compounds via triflic acid promoted hydrolysis/cyclization sequence of 2-(alkynyl)benzamides under microwave condition was achieved. The substrate scope of the reaction was broad to include not only aromatic but also

Oxidation of 3-arylisochromans by dimethyldioxirane. An easy route to substituted 3-arylisocoumarins

Bovicelli, Paolo,Lupattelli, Paolo,Crescenzi, Benedetta,Sanetti, Anna,Bernini, Roberta

, p. 14719 - 14728 (2007/10/03)

The selective oxidation of the two different benzylethereal position of 3-arylisochromans by dimethyldioxirane as a function of different substituents on the aromatic rings was studied. The easy oxidation of these compounds was exploited for a new easy ac

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